Ok my truck used to start up idle high but run fine until it idled down then it spits and sputters and kills itself it seems to be running rich and now it won't crank over its an 89 302 with an 88 302 ecm replaced starter solenoid alternator battery fuel filter fuel pressure regulator plugs wires ignition coil and idle air control valve but haven't got to check if that fixed the idle problem do to starting issue plzz help and thanks in advance